Change-valve



(llodeL) J, FOWLER. Change Va-lv es.

No. 228,051. Patent d-Mans,- 188(1).

INVENTOR ATTGRN 5v WITNESSES 1 N. PETERS, PNOTD-LITNOGRAPHER,WASHINGTON, D. Q

. U ITED STATES PATENT OFFICE.

JOHN FOWLER, or LOUISVILLE, KENTUCKY.

CHANGE-VALVE.

SPECIFICATION forming part of Letters Patent No. 228,051, dated May 25,1880. Application filed April 10, 1880. (Model) T 0 all whom it mayconcern:

Be it known that I, JOHN FOWLER, of Louisville, in the county ofJeii'ersou and State of Kentucky, have invented a new and valuableImprovement in Gl1ange-Valves; and I do hereby declare that thefollowing is a full, clear, and exact description of the constructionand operation of the same, reference being had to the annexed drawings,making a part (f tlns specification, and to the letters and figures ofreference marked thereon.

Figure 1 of the drawings is a representation of a longitudinal sectionof my improved char ge-valve'. Fig. 2 is a detail view of theoperating-shaft and its arm.

TllS invention has relation to means for changing the direction of aflow of steam, gas, liquids. or other substances; and it consists in theconstruction and novel arrangement of the vrive-chests and valve-seats,the reciprocating se.f-adj ustin g valves and their rodconnection, andthe cran k-shifter and its operatinghandle also, in the combination,with the valve-stem, of a loose or sliding valve, all as hereinafterfully shown and described.

In the accompanying drawings, the letter A designates the valve-boxhaving the flanged opening B, whereby it may be connected to a pipe. Ateach end of the valve-box openings G are made, and internally threadedto receive theflanged valveseats D and E, the latter having usually arecess, F, and a shoulder-seat,.G, as shown in the drawings.

H H designate the main valves, which are provided with guide-stems I K,which pass through the guide-openings a b of the valveseats. Thesevalves are maintained at a proper distance from each other by a rod, L,which extends by its ends into recessescof the valves. The ends of therod fit loosely in these recesses, and are secured by pins (1, so that alittle play is allowed to each valve, sufficient to enable it to adjustitself squarely on itsseat and close the opening.

In order to move the valves to and frobetween their seats in thevalve-box, a crankshifter, R, is employed.- This consists of a rod orshaft, 0, passed through a close or packed bearing, f, in the valve box,and having a double arm or. shifting projection, g, which plays betweenthe valves H H, usually upon the connecting-rod L. The outer end of theshaft 0 is provided with an operating armor crank, h, by moving whicheither of the valves can be brought against its seat, its fellow beingat the same time lifted or moved away from its seat. In this manner theflow by the opening B through the valve-box may be directed at willthrough either valve-seat opening 0. Sometimes a sliding valve, S, isemployed, especially when there is pressure in the chamber or receiverconnected with the flanged valve-seat E, this valve being looselyarranged on the stem K of one of the main valves connected with theshifter, and being designed to close against the seat G automatically.The object of this valve is to close the opening to the receiver whenthe pressure in the valve-box is relieved by thereaction of the pressurein the receiver against said valve, forcing it against its seat.

This shifting or change valve may be used for various purposes, but itsprincipal object is as follows When connected with a still in adistillery the engineer can use the exhauststeam from his engine withoutbeing under the necessity of notifying any one to close the main valveswhen he desires to stop his engine. In this connection the valve S willclose automatically on account of the pressure in the still, therebypreventing any liquid or matter returning through the pipes into theengine. When used for other purposes not requiring an automatic valvethe valve S may be omitted in the construction.

I am aware that a pressure-regulating valve has been arranged with anoperating-shaft and weighted crank-arm to hold one of two oppositevalves to an outer seat, said valves being connected by arigidly-attached stem; and I do not claim such devices, my valves beingarranged between the seats and kept to seat by pressure of the water orsteam.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. The change valve consisting of the box A, having openings B G andcrank-shifter R,

journaled in the box, and having the arm g,

provided with jaws, the valve-seats D E, the self-adj usting valves H Hbetween said valveseats, and having guided stems, and the conslidingvalve S on the long stem K, substan- 1o nectingrod L, freely seated inrecesses in said tially as specified.

valves, all constructed and arranged to oper- In testimony that I claimthe above I have ate substantially as specified. hereunto subscribed myname in the presence 2. The change-valve consisting of the box of twoWitnesses.

A, having the openings B O and the valve- JOHN FOWLER.

seats D E G, the self-adjusting valves H H, Witnesses:

their guided stems I K, and loosely-connected AL. AINSLEE,

rod L, the crank-shifter R, and the automatic THOS. W. MORAN.

